✅ Session-based authentication with RBAC
✅ CSRF protection for state-changing operations
✅ Rate limiting on auth endpoints
✅ Input validation with Zod schemas
✅ Secure headers automatically applied
✅ Environment validation with type safety

• Use strong SESSION_SECRET (64+ chars)
• Enable HTTPS
• Run npm audit for vulnerabilities
• Set NODE_ENV=production
• Configure proper CORS origins

Content-Security-Policy: default-src 'self';
X-Content-Type-Options: nosniff
X-Frame-Options: DENY

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